In this letter, we present a design of a linear array of tilted dipoles to achieve radiation patterns with asymmetric angular filtering characteristics. To realize the asymmetric radiation, the dipole elements are spaced by a distance larger than half a wavelength, thus allowing for grating lobes to occur in the visible region. Moreover, the dipoles are loaded with artificial dielectrics to increase the front-to-back ratio and consequently to enable higher gain in certain desired angular regions. Based on the design, a linear array with ten elements is manufactured and tested. The measured results show the ability of such an array to achieve stable gain from broadside up to 90° scanning while implementing a stopband angular filter for negative scanning angles.

中文翻译：

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用于角度滤波的具有非对称辐射方向图的倾斜偶极子线性阵列

在这封信中，我们介绍了倾斜偶极子线性阵列的设计，以实现具有非对称角滤波特性的辐射方向图。为了实现非对称辐射，偶极子元件的间距大于半个波长，从而允许在可见光区出现栅瓣。此外，偶极子装有人造电介质，以增加前后比，从而在某些所需的角度区域实现更高的增益。基于该设计，制造并测试了具有十个元件的线性阵列。测量结果表明，这种阵列能够在从宽边扫描到 90° 扫描范围内实现稳定增益，同时对负扫描角实施阻带角滤波器。